Mexico, Chihuahua, 3-4 1/2 mi NE of Rio Batopilas Bridge, Barranca Batopilas.
1066-1371 meters
3500 - 4500 ft.
Volcanic sun slope.
Extensive population of single, light glaucous rosettes, maturing large; leaves mostly lanceolate, to 1.7 m long, mostly 1.2-1.5 m; panicles 6-7 m tall with mostly 24-30 small lat. umbels, shaft frequently sinous, lats. Short to medium; invading old cleared milpa areas; flowers pale yellow.